uaa3515a NXP Semiconductors, uaa3515a Datasheet - Page 26

• Manufacturer Part Number: uaa3515a
• Description: 900 Mhz Analog Cordless Telephone Ic
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.9.10
The register VCTL enables the volume control of the earpiece amplifier to be set to a predefined gain. This is achieved
by switched feedback resistor R
hardware control.
Table 15 Volume control bit selection
7.9.11
On-chip crystal reference tuning is provided to compensate for frequency spread over process and temperature changes.
An external capacitor should be connected at pin XTALI; the value of the capacitor should be approximately 3 pF less
than the capacitance of pin XTALO. Internally, a programmable capacitance is available in parallel with the XTALI pin.
Tuning capacitance values are in the range 0 to 4.5 pF; see Table 16.
Table 16 Xtal tuning cap register
2002 Sep 09
900 MHz analog cordless telephone IC
BIT 3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
V
C
BIT 1
OLUME CONTROL
RYSTAL TUNING CAPACITORS
0
0
1
1
1
1
1
BIT 2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
int
BIT 0
. The optional resistor R
0
1
0
1
1
1
1
BIT 1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
R
int
70.2
70.2
70.2
70.2
ext
14
24
41
26
(k )
, connected between pins EARI and EARO provides the
BIT 0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
SELECT
R
ext
none
none
none
none
100
10
11
12
13
14
15
33
15
0
1
2
3
4
5
6
7
8
9
(k )
CAPACITANCE (pF)
Product specification
UAA3515A
G
EAR
0.2
0.5
0.8
1.1
1.4
1.7
2.0
2.3
2.6
2.9
3.2
3.5
3.8
4.1
4.4
4.7
4.7
9.3
9.4
4.1
14
0
1
(dB)